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Abstract:Two test sections, one on new construction and the other on a maintenance resurfacing project, were installed in the fall of 1980 to evaluate the proprietary asphalt product Chem-Crete. Dynaflect and density measurements were performed on the experimental and control mixes and the performance of the pavements is being evaluated. Raveling was noticed, especially in the Chem-Crete mix, approximately 2 months after paving; however, the deterioration stabilized shortly thereafter. Traffic appeared to heal the control mix; however, some deep raveling and several potholes remain in the Chem-Crete portions. The high-absorption sand used in the mixes might have been partially responsible for the failures. Pavement deflections were not reduced significantly in either of the overlaid sections. Strength did not develop as rapidly in either mix on-the pavement as it did in specimens prepared and cured at 140°F. (60°C) in the laboratory There was no significant difference between the results of stripping tests on the control mix and those on the Chem-Crete mix prepared in the laboratory. The Chem-Crete mix exhibited superior fatigue characteristics under constant stress tests and the control mix did the same under constant strain tests.
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